diff --git a/src/flash/nor/pic32mx.c b/src/flash/nor/pic32mx.c
index 6ede6667c..2b27ec5b8 100644
--- a/src/flash/nor/pic32mx.c
+++ b/src/flash/nor/pic32mx.c
@@ -449,8 +449,10 @@ static int pic32mx_write_block(struct flash_bank *bank, uint8_t *buffer,
 		row_size = 512;
 	}
 
-	retval = target_write_buffer(target, write_algorithm->address,
-			sizeof(pic32mx_flash_write_code), (uint8_t *)pic32mx_flash_write_code);
+	uint8_t code[sizeof(pic32mx_flash_write_code)];
+	target_buffer_set_u32_array(target, code, ARRAY_SIZE(pic32mx_flash_write_code),
+			pic32mx_flash_write_code);
+	retval = target_write_buffer(target, write_algorithm->address, sizeof(code), code);
 	if (retval != ERROR_OK)
 		return retval;